A casino (or csino or casin) is a place where people gamble by playing games of chance or skill. Customers place cash or casino chips on various possible random outcomes, and the house takes a commission known as the rake. Some casinos also offer complimentary items or comps to attract customers. Casinos may also host entertainment events, such as concerts and shows. The exact origin of gambling is uncertain, but it has long been an integral part of human culture.

A notable casino is the Monte Carlo Casino in Monaco, built in 1863 and a significant source of income for the principality of Monaco. It is considered to be one of the world’s most beautiful casinos, and has appeared in several movies including Ocean’s Eleven.

Most modern casinos use technology to monitor and control the games. In roulette, for example, betting chips have microcircuitry that allows them to be monitored minute by minute, and to detect any anomaly; the results of dice rolls are recorded electronically; and in card games such as poker, computer systems regularly oversee the hands played.

In addition, the use of cameras throughout the casino ensures the integrity of the game. Some casinos are designed with catwalks that allow surveillance personnel to look directly down on the tables and slots through one-way glass. The security measures are necessary because of the large amounts of money handled within a casino, and the temptation for patrons and staff to cheat, either in collusion or independently.